High temperature Raman study of UO₂: A possible tool forin situestimation of irradiation-induced heating

Abstract

Recently, in situ Raman setups under irradiation become available, and uranium dioxide is one of the most studied compounds. This paper reports the temperature dependence of the only Raman‐active mode in fluorine UO2. Besides the interest in terms of phonon anharmonicity knowledge, this can be used to estimate the heating induced by irradiation: The frequency shift and width of the T2g peak can be used as an internal indirect probe of the local temperature in the 20–590 °C range. Copyright © 2015 John Wiley & Sons, Ltd.

Raman spectroscopy as suitable tool for the field study of recent volcanic environments

“…The Raman setup was developed for the in situ measurements under irradiation or at high temperature (see details in). The setup (50‐mW CW 532nm laser, Renishaw RA100 spectrometer of 250‐mm focal length and equipped with a 1800‐l/mm grating) presents great performances and can be occasionally brought to the field: it can be qualified as portable according to Colomban .…”

“…In this frame, in October 2013, we brought the extreme conditions spectrometer of the CEMHTI lab to the Piton de la Fournaise volcano for field and rear‐base characterization of natural volcanic samples. This paper relates the preliminary results of the field campaign.…”

Recent advances in linear and non‐linear Raman spectroscopy. Part X

“…Guimbretiere and co‐workers reported a high temperature Raman study of UO 2 as a possible tool for in situ estimation of irradiation‐induced heating. They found that the frequency shift and width of the T2g peak can be used as an internal indirect probe of the local temperature in the 20‐590 °C range . Jiang et al .…”

Field remote Stokes/anti‐Stokes Raman characterization of sulfur in hydrothermal vents

“…Raman spectroscopy has been recently reported as a suitable technique for the identification of lava and minerals in a recent volcanic environment and can be implemented remotely . Moreover, accurate temperature measurement is a key point for the understanding of lava flow dynamics and the Raman spectral data allow an estimation of the targeted sample temperature through references measurements or Stokes/anti‐Stokes (S/AS) intensity ratio …”

“…Raman spectroscopy has been recently reported as a suitable technique for the identification of lava and minerals in a recent volcanic environment [4,5] and can be implemented remotely. [6,7] Moreover, accurate temperature measurement is a key point for the understanding of lava flow dynamics [8,9] and the Raman spectral data allow an estimation of the targeted sample temperature through references measurements [10,11] or Stokes/ anti-Stokes (S/AS) intensity ratio. [12][13][14][15][16] In this study, we report on the development and implementation of remote field Raman system dedicated to study the medium temperature minerals in active volcanic environments.…”